/Engine/Source/Runtime/Engine/Public/PrimitiveSceneProxy.h
Updates the primitive proxy's cached transforms for all instances given a buffer of instance updates.
virtual void UpdateInstances_RenderThread ( const [FInstanceUpdateCmdBuffer](API\Runtime\Engine\FInstanceUpdateCmdBuffer) & CmdBuffer, const FBoxSphereBounds & InBounds, const FBoxSphereBounds & InLocalBounds, const FBoxSphereBounds & InStaticMeshBounds )